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25 January, 03:58

5x-7y=-2

-5x-10y=-15

+1
Answers (1)
  1. 25 January, 04:07
    0
    {5x-7y=-2

    {-5x-10y=-15 (+)

    5x-5x-7y-10y=-17

    -17y=-17 / : (-17)

    y=1

    5x-7 * 1=-2

    5x-7=-2 / + 7

    5x=5 / : 5

    x=1

    Solution: (1; 1)
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